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SEMICOSIL® 989/1K

1 of 27 products in this brand
SEMICOSIL® 989/1K is a one-part, ready-to-use silicone rubber that cures through thermal curing. It is non-slumpy and exhibits thixotropic properties, making it easy to handle and apply. This transparent silicone rubber has a medium hardness, providing a balance between flexibility and rigidity. It cures rapidly with heat and offers primerless adhesion to a wide range of substrates.

Product Type: 1K (1 component) Adhesive

Application Area: Form In Plastic Gaskets (FIPG), Gaskets

Cure Method: Chemical Cure, Heat Cure

Chemical Family: Silicones

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Applications & Uses

Applications
  • Automotive Electronics
  • Bonding & Sealing
  • Electrics & Electronics
  • Power Electronics
  • General purpose adhesive for the electronics industry
  • FIPG applications
Application Details

Processing

  • Surface preparation
    • All surfaces must be clean and free of contaminants that will inhibit the cure of SEMICOSIL® 989/1K. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds.
    • If a substrate’s ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.
       
  • Dispensing
    • Because of the thixotropy (shear thinning effect) SEMICOSIL® 989/1K can be dispensed easily with all dispensing equipments.
    • To eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended.
    • SEMICOSIL® 989/1K shows good primerless adhesion to many substrates. We recommend running preliminary tests to optimize conditions for the particular application.
       
  • Curing
    • SEMICOSIL® 989/1K works best when cured at 115 °C or more depending on the size and heat sink properties of the components.
       
  • Temperature

    Curing time,
    thickness 1 cm

    100°C 6h
    130°C 1h
    150°C 10 min

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)approx. 1.1 g/cm³DIN 53479
Dynamic Viscosity (at 25°C, Shear rate 0.5 s⁻¹)300000mPa·sDIN EN ISO 3219
Dynamic Viscosity (at 25°C, Shear rate 25 s⁻¹)30000mPa·sDIN EN ISO 3219
Cured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)approx. 1.07 g/cm³DIN EN ISO 1183-1 A
Elongation (at break)200%DIN 53504 S2
Shore Hardness A55ISO 868
Tensile Strength5N/mm²DIN 53504 S2
Uncured Properties
ValueUnitsTest Method / Conditions
Densityapprox. 1.07 g/cm³DIN EN ISO 1183-1
Dynamic Viscosity (at 25°C, Shear rate 0.5 s⁻¹)300000mPa·sDIN EN ISO 3219
Dynamic Viscosity (at 25°C, Shear rate 25 s⁻¹)300000mPa·sDIN EN ISO 3219
Properties
  • One-part, ready-to-use
  • Thixotropic
  • Transparent
  • Medium hardness
  • High flexbility
  • Rapid heat curing
  • Primerless adhesion to many substrates
Note

Cured for 30 min at 150 °C in a circulating air oven

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania